Gas exchange, which is necessary for photosynthesis, can occur most easily in which leaf tissue?

Answer: Magnesium loses two electrons whilst sulfur gains tw

Protonation of the carbonyl O atom, Nucleophilic attack by the alcohol, Deprotonation of the conjugate acid of the hemiacetal, Protonation and elimination of H2O, Second nucleophilic attack, Deprotonation of the conjugate acid of the acetal.

An acetal is a functional group in organic chemistry with connectivity R2C(OR')2. The R groups in this case can be either hydrogen or organic fragments (a carbon atom with any additional atoms connected to it), but the R' groups must be organic fragments. The two R' groups might or might not be equivalent to one another (a "symmetric acetal") (a "mixed acetal"). Acetals have the same oxidation state at the central carbon as similar carbonyl compounds and are generated from or convertible to aldehydes or ketones Nucleophilic attack. However, they exhibit significantly greater chemical stability and reactivity. Since the center carbon atom is bound by four bonds, it is saturated and has a tetrahedral geometry.

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(a) The reaction is endothermic.

(b) The heat is coming from the surroundings.

(c) The heat is absorbed by the reaction.

(a) The reaction is endothermic because the beaker feels cool in your hand. In an endothermic reaction, heat is absorbed from the surroundings, resulting in a decrease in the temperature of the immediate environment.

(b) The heat is coming from the surroundings. As the reaction proceeds, it requires energy in the form of heat, which it absorbs from the surrounding environment.

(c) The heat is going into the reaction. In an endothermic reaction, heat energy is absorbed by the reactants, causing their temperature to increase. This absorption of heat allows the reactants to undergo the chemical reaction and proceed toward the formation of products.

Overall, in an endothermic reaction, the heat is absorbed from the surroundings, causing the beaker to feel cool in your hand. The heat energy is utilized by the reaction to drive the chemical transformation of the reactants into products.

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Answer:

5

Explanation:

chemical formulas show what atoms are in a molecule.  In this case there is 1 hydrogen (H), 1 chlorine (Cl), and 3 oxygens (O).  The 3 behind the oxygen is a subscript and tells us that there are 3 oxygen atoms.

Another example is H2O which as 3 atoms. 2 hydrogens (H) and 1 oxygen (O).  This formula has a subscript 2 behind the hydrogen showing that there are 2 hydrogens.

To determine the percent by mass of a compound, you will need to use the formula:% by mass = (mass of element / molar mass of compound) x 100Given that the compound contains 6.0 g of carbon and 1.0 g of hydrogen and has a molar mass of 42.0 g/mol.

We can find the percent by mass of carbon and hydrogen as follows: Mass of Carbon = 6.0 g Mass of Hydrogen = 1.0 g molar mass of the compound = 42.0 g/mol

Using the formula,% by mass of Carbon = (mass of element / molar mass of compound) x 100= (6.0 g / 42.0 g/mol) x 100= 14.28% % by mass of Hydrogen = (mass of element / molar mass of compound) x 100= (1.0 g / 42.0 g/mol) x 100= 2.38%

Therefore, the percent by mass of carbon and hydrogen in the given compound are 14.28% and 2.38% respectively.

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The responding variable refers to the variable that changes as the independent variable is being manipulated. In this case, the responding variable is the number of paper clips attracted by the magnet.

An experiment must include a dependent (responding) variable and an independent variable. As the independent variable is manipulated during the experiment, the dependent (responding) variable changes accordingly.

In this case; the independent variable is temperature while the dependent (responding) variable is the number of paper clips attracted by the magnet.

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There are 6.02 x  \(10^{24}\) atoms of carbon in 5 moles of ethane.

We can see from the formula of ethane that each molecule has 2 carbon atoms so

1 mole of ethane = 2 moles of carbon atom

5 moles of ethane = 5  x 2 = 10 moles of carbon atom

Avogadro number =  6.02 x \(10^{23}\)

Avogadro predicted that identical volumes of any two gases with comparable temperatures and weights must hold an equivalent number of particles in order for this to be true. Only if there were a distinction between atoms and molecules and certain elements, like nitrogen, genuinely existed as molecules, could this law be proven to be true. Given that Avogadro lacked terminology like "molecule" to describe his hypothesis and that his ideas encountered resistance from people like John Dalton, among others, Another chemist, Stanislao Cannizzaro, was required to give Avogadro's theories the attention they deserved. Avogadro had already passed away by the time their concepts acquired popularity.

No. of carbon atoms in 10 moles of carbon =  10 x  Avogadro number

                                                                        =  10 x  6.02 x \(10^{23}\)

                                                                        =  6.02 x  \(10^{24}\) atoms of carbon

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Answer:

151.72 g of Fe

Explanation:

4Fe + 3O2 = 2Fe2O3

4 moles of Fe will react to 3 moles of O2

Fe has atomic mass of 55.85 g/mole

O2 has atomic mass of 16 x 2 = 32 g/mole

=> 4Fe = 4 x 55.85 = 223.4 g

=> 3O2 = 3 x 32 = 96 g

so the amount of Fe: (223.4 x 65.2)/96 = 151.72

The researcher should select arsenic because it belongs in the same group as phosphorus but has a higher atomic mass.

The correct option is C.

Phosphorus is in Group 15 (also known as Group V) of the periodic table. Elements in this group have 5 valence electrons, which means they tend to form compounds with a -3 oxidation state.

Other elements in Group 15 are:

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Answer:

7L

Explanation:

Divide 101 by 10.1(kPa) and you get 10.

10 x .7 = 7

The concept Boyle's law is used here to determine the new volume of gas . Boyle’s law was put forward by the Anglo-Irish chemist Robert Boyle in the year 1662. Here the new volume of the gas is 0.07 L.

A gas law known as Boyle's law asserts that a gas's pressure is inversely proportional to its volume when it is held at a fixed temperature and of a given mass. To put it another way, as long as the temperature and volume of the gas remain constant, the pressure and volume of the gas are inversely proportional to one another.

For a gas, the relationship between volume and pressure (at constant mass and temperature) can be expressed mathematically as follows.

P = k*(1/V) ⇒ PV = k

For two different gases, the equation is:

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂

10.1 × 0.7 / 101 = 0.07 L

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Answer: 29.16%

Explanation:

The total of 2 percentages need to equal 100% so we subtract the percent they gave us from 100.

Fatty acid groups are referred to as B) acyl groups.

Fatty acids are organic compounds that consist of a long hydrocarbon chain with a carboxyl group (-COOH) at one end. The hydrocarbon chain is composed of carbon and hydrogen atoms, and its length can vary. Fatty acids play essential roles in various biological processes and are major components of lipids, including triglycerides and phospholipids.

When a fatty acid is involved in chemical reactions or is attached to other molecules, it typically undergoes a process called activation, where it is converted into an acyl group. An acyl group is formed by replacing the -OH (hydroxyl) group of the carboxyl group with an -OR (alkoxy) group. The -OR group can be derived from various molecules, such as coenzyme A (CoA) or other acyl carrier proteins.

For example, when a fatty acid is activated for incorporation into a triglyceride molecule, it forms a triglyceride acyl group. Similarly, when a fatty acid is incorporated into a phospholipid molecule, it forms a phospholipid acyl group. The acyl group represents the hydrocarbon chain of the fatty acid, which may vary in length and saturation.

Therefore, the correct answer to the question is B) Acyl.

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Answer:

D: Chlorine( I may be wrong my chemistry year was a nightmare)

The awnser is chlorine (Cl) trust me

Operators analyze the ability of a treatment process to remove or an activate oocysts by coagulation and flocculation.

Coagulation and flocculation are methods that are used to separate the suspended solids portion from the water. Suspended particles may vary in source, charge, particle size, shape, and density. Correct application of coagulation and flocculation usually depends upon these factors.

Coagulation is also defined as the destabilization of colloidal particles brought about by the addition of a chemical reagent called as coagulant. Flocculation is defined as the agglomeration of destabilized particles into micro-floc and after into bulky floccules which can be settled called floc.

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Answer:

Hence, the wavelength of the photon associated is 1282 nm.

Explanation:

The value of ΔG at 298 K for a reaction mixture containing 1.9 atm N2, 1.6 atm H2, and 0.65 atm, the answer is (a) -3.86 × 10^3.

NH3 can be calculated using the equation:

ΔG = ΔG° + RT ln(Q)

where ΔG is the standard Gibbs free energy change, ΔG° is the standard Gibbs free energy change at standard conditions, R is the gas constant, T is the temperature in Kelvin, and Q is the reaction quotient.

In this case, we are given ΔG° as -33.3 kJ/mol. To calculate Q, we need to use the partial pressures of the gases in the reaction mixture. The reaction stoichiometry tells us that the ratio of the partial pressures of N2, H2, and NH3 is 1:3:2. Therefore, we can write:

Q = (P(NH3))^2 / (P(N2) * P(H2)^3)

Plugging in the given values of P(N2) = 1.9 atm, P(H2) = 1.6 atm, and P(NH3) = 0.65 atm, we can calculate Q. Then, using the value of R = 8.314 J/(mol·K) and the temperature T = 298 K, we can substitute these values into the equation and solve for ΔG.

The calculated value of ΔG at 298 K for the given reaction mixture is approximately -3.86 × 10^3 J/mol. This value is equivalent to -3.86 kJ/mol. Therefore, the answer is (a) -3.86 × 10^3.

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Answer:

a

Explanation:

i took test

Answer:

The element was discovered on Earth in 1817 by Johan August Arfvedson (1792-1841) in Stockholm when he investigated petalite, one of the first lithium minerals to be discovered. (It was observed to give an intense crimson flame when sprinkled on to a fire.)

Answer:

Inertia.

Explanation:

The resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

We have that for the Question "How can the motion of an object that is NOT moving change?" it can be said that Force is the reason for motion and is how can the motion of an object that is NOT moving change

From the question we are told

How can the motion of an object that is NOT moving change?

Generally

Motion defines as the movement of a body from one place to another

Therefore

What the question is asking is

What makes the movement occur

Force

Force is defines as Mass of of an object times its acceleration but aslo is

the work done in a given time frame

Therefore

Force is the reason for motion and is how can the motion of an object that is NOT moving change

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Answer:

Sodium (Na) has more protons than carbon (C).

hope that helps!

The name for the ionic compound pu(oh)3  is Plutonium(III) hydroxide.

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Answer:

Electrolytes, particularly sodium, help the body maintain normal fluid levels in the fluid compartments because the amount of fluid a compartment contains depends on the amount (concentration) of electrolytes in it. If the electrolyte concentration is high, fluid moves into that compartment (a process called osmosis).

Explanation:

Answer:

Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help

Balance the amount of water in your body

Balance your body's acid/base (pH) level

Move nutrients into your cells

Move wastes out of your cells

Make sure that your nerves, muscles, the heart, and the brain work the way they should

Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.

The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.

Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.

Answer: C

Na + O2 →Na2O

Explanation:

A

MgCO3→MgO + CO2 balanced

B

NaCl + KI →NaI + KCl balanced

C

Na + O2 →Na2O not balanced the balanced would be 4Na + O2 →2Na2O

D

Ca + MgSO4→CaSO4+ Mg balanced

Answer:

0.756 J

Explanation:

Temperature change (delta T) = 0.855 degrees Celsius

Mass of water (m) = 0.2067 g

Specific heat capacity of water (c) = 4.28 J/g degrees C

Heat added = m * c * delta T

= (0.2067 * 4.28 * 0.855) J

= 0.756 J

P, R, and T are constant, then the volume is directly proportional to the mole. Then the correct option is A.

An ideal gas is a theoretical composed of a set of randomly moving gas particles that interacts only through elastic collision.

Given

A balloon containing 0.040 mol of a gas with a volume of 5.0 mL was expanded to 1.0 L.

\(V_1=5\ ml\)

\(V_2=1000\ ml\)

\(n_1=0.040\ mole\)

We know the equation of the ideal gas.

\(PV=nRT\)

where P, R, and T are the constant, then

\(\dfrac{V_2}{V_1}=\dfrac{n_2}{n_1}\)

\(V_2=n_2\times \dfrac{V_1}{n_1}\)

Thus, the correct option is A.

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Answer:

answer in picture

Explanation:

Answer:

290 L (3 s.f.)

Explanation:

First, balance the equation:

2H₂(g) + O₂(g) → 2H₂O(g)

Now, calculate the number of moles in the given mass of oxygen gas (O₂) by using the formula:

\(\boxed{n = \dfrac{m}{M}}\)

where:

The molar mass of O₂ is 31.999 g/mol.

Therefore, the number of moles in 155 g of oxygen gas is:

\(\rm \dfrac{155\;g}{31.999\;g/mol}=4.844\; \rm mol\;(3\;d.p.)\)

We have been told that hydrogen is in excess, which means we can assume that all the moles of oxygen will react.

The mole ratio between oxygen gas and water is 1 : 2. This means that the reaction will produce twice as many moles of water as moles of oxygen. Therefore, the number of moles of water is:

\(\rm 4.844\times 2=9.688\; \rm mol\;(3\;d.p.)\)

To determine how many liters of water can be made at 0.850 atm and 310 K, use the ideal gas law equation.

\(\boxed{PV=nRT}\)

where:

Rearrange the formula to isolate V:

\(\implies V=\dfrac{nRT}{P}\)

Substitute the values into the formula and solve for V:

\(\implies V=\rm \dfrac{9.688\;mol \cdot 0.082057... atm\;L\;mol^{-1}\;K^{-1} \cdot 310\;K}{0.850\;atm}\)

\(\implies V=\rm \dfrac{9.688\cdot 0.082057...\;L \cdot 310}{0.850}\)

\(\implies V=\rm 289.930...\;L\)

\(\implies V=\rm290\;L\;(3\;s.f.)\)

Therefore, 290 liters of water (to three significant figures) can be made from 155 grams of oxygen gas and an excess of hydrogen at 0.850 atm and 310 K.

Answer: 1/4

Explanation:

2.4/0.09=2  

1=1/2

2=1/4

3=1/8

So therefore because we got 2 , so it will be 1/4.

For comparing the percent compositions of  \(C_{3} H_{6}\) and  \(C_{4} H_{8}\), we need to calculate the percentage of carbon (C) and hydrogen (H) in each compound.

Let's start with \(C_{3} H_{6}\)

\(C_{3} H_{6}\) consists of 3 carbon atoms and 6 hydrogen atoms.

To calculate the percent composition of each element, we divide the number of atoms of that element by the total number of atoms in the compound and multiply by 100.

Percent composition of carbon (C) in  \(C_{3} H_{6}\):

(3 carbon atoms / 9 total atoms) x 100 = 33.33%

Percent composition of hydrogen (H) in  \(C_{3} H_{6}\):

(6 hydrogen atoms / 9 total atoms) x 100 = 66.67%

Now let's move on to  \(C_{4} H_{8}\):

\(C_{4} H_{8}\) consists of 4 carbon atoms and 8 hydrogen atoms.

Percent composition of carbon (C) in  \(C_{4} H_{8}\):

(4 carbon atoms / 12 total atoms) x 100 = 33.33%

Percent composition of hydrogen (H) in  \(C_{4} H_{8}\):

(8 hydrogen atoms / 12 total atoms) x 100 = 66.67%

Comparing the percent compositions of \(C_{3} H_{6}\) and  \(C_{4} H_{8}\), we find that they have the same percentage composition for carbon (33.33%) and the same percentage composition for hydrogen (66.67%). This means that both compounds have the same relative proportions of carbon and hydrogen.

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Answer:

19.6 g of N2

Explanation:

2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2O

In the above equation how many grams of N2 can be made when 167 grams of CuO are consumed?

Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0

Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:

Hydrogen

1

Nitrogen

14

Copper

63.5

Oxygen

16

first, we should rewrite the equation without using "g " for the yields sign

2 NH3 + 3 CuO ---------> 3 Cu + N2 + 3 H2O

next we need the molar mass of the compounds

CuO =63.5 + 16 = 79.5

N2 = 2 x 14 = 28

next , we see that 3 moles of CuO produce 1 mole of N2

167 g of CuO is 167/79.5 = 2,1 moles of CuO

since 3 moles produce 1 mole of N2

2,1 moles produce 2.1/3 = 0.7 moles of N2

1 mole of N2 is 28 gm

0.7 moles is 28x0.7 = 19.6 g of N2

The correct options for the outer electron configurations that would belong to a reactive metal are c. ns\(_{1}\) and d. ns\(_{2}\)np\(_{3}\).

Reactive metals tend to have fewer valence electrons and are more likely to undergo chemical reactions to achieve a stable electron configuration. Option c. ns\(_{1}\) represents an outer electron configuration with a single electron in the outermost shell, which is characteristic of reactive metals. Option d. ns\(_{2}\)np\(_{3}\) indicates the presence of three valence electrons in the outermost shell, making it likely to participate in chemical reactions.

Option c and d are the correct answers.

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